Tim van Rijthoven completed an astonishing week at the Rosmalen Grass Court Championships by stunning Daniil Medvedev to claim the title on home soil.
World ranked 205 Van Rijthoven had never won an ATP main draw match before receiving a wild card into this event, in which he has enjoyed a dream week.
The Dutchman beat Felix Auger-Aliassime to progress to a final with Medvedev, who is set to return to world number one on Monday.
But he made light of the gulf in tour experience and ranking by powering to a 6-4 6-1 win.
He dominated the contest on serve, landing 74 per cent of his first serves and winning 84 per cent of his first-serve points. Van Rijthoven also lost just four points on second serve.
By contrast, Medvedev won just 56 per cent of points on his first serve and a paltry 38 per cent on his second, the US Open champion facing 10 break points in the contest.
Van Rijthoven raced into a 5-0 lead in the second set and, though Medvedev saved one match point to avoid a bagel, a fairytale win was sealed in the next game when the Russian could only return a serve into the net to spark jubilation among the home fans.